According to the OECD, life satisfaction measures how people evaluate their life as a whole rather than their current feelings. It captures a ref lective assessment of which life circumstances and conditions are important for subjective well-being. In 2014, they asked a random sample of 1000 Canadians to rate their general satisfaction with life on a scale from 0 to 10, and the average result was 7.6. A similar survey of 1000 people in Switzerland gave an average result of 7.8. We are interested in whether people in Switzerland are more satisfied with life than people in Canada.

a) What missing information do you need in order to conduct a statistical test to answer this question?

b) State the hypotheses that you would test.

c) Explain whether this is a case of paired samples.